NO. 3534 EURYTEMORA — WILSON AND TASH 555 



segment 1 with 2 outer spines; inner process directed inwards and 

 about 4 X width of distal part of segment; inner apical spine of 

 exopod 2 much longer than outer apical spine. Male: Antennules a 

 little longer than metasome, mth stout, long aesthetes; spines of 

 segments 8-12 of right antennule not more developed than those of 

 left. Leg 5 of adult: Right exopod 2 constricted near middle with 

 basal part wider than distal; anterior proximal part of left basal 

 segment 2 produced into spinous point; left exopod 2 without apical 

 digitiform protrusion. Leg 5 of copepodid stage V: Inner apical spine 

 of exopod 2 much longer than outer spine, that of left side the longer, 

 equaling half or more of the length of its segment. 



Description of female. — Total length: 1.85-2.02 mm.(metasome= 

 total anterior division, 1.09-1.16; urosome, 0.765-0.855; measure- 

 ments middorsal line, top of head to end of caudal rami, from specimens 

 in which urosome was separated and mounted in shallow depression 

 slide to overcome effect of ventral curvatm'e). All segments of 

 metasome well defined (figs, la, 6) ; greatest width in second segment 

 (thoracic somite 1) equal to about one-half total length of metasome. 

 Cephalic segment rounded anteriorly, slightly broadened at midpoint, 

 without pronounced cephalic depression (viewed laterally in exact 

 midline); dorsal cuticular protuberance at distal midpoint of seg- 

 ment, variable in size and prominence (fig. la). Last 2 segments 

 of metasome reduced in both width and length (fig. 16); wings of last 

 segment not expanded laterally, nearly symmetrical, produced posteri- 

 orly to near midpoint of genital segment, apices rounded and each 

 bearing a fine, sensory setule (figs. Ic, d). 



Urosome (figs. Id, e) : Genital segment rounded laterally in proximal 

 half but without prominent protrusions either laterally or ventrally; 

 operciJum (external genital flap) broader than long, rounded distally, 

 partially encircled by depressed cuticular ornamentation of nar- 

 row, lobed sclerotizations armed with short setules (fig. \e). 

 Segments 2 and 3 with lateral hau-s that extend over distal outer 

 portion of dorsal surface of segment 3. Caudal rami a little longer than 

 segments 2 + 3 (about 1.13:1); widest just below base, length about 

 6 X this greatest width; inner and outer margins with fine hairs and 

 dorsal surfaces with closely placed, short, scalelike hairs. Terminal 

 caudal setae (except short, dorsally placed seta) slender, unjointed, 

 longer than rami; lateral seta a little shorter, plumose only on inner 

 margin; second apical seta (from outer margin) the longest. 



Antennule Cfig. \g) reaching to about middle of metasomal wings or 

 a little beyond; 24-segmented (counting imperfectly separated seg- 

 ments 8-9); beginning with 12, the segments regularly elongated; 



